JP5435411B2 - Image forming apparatus and opening / closing apparatus - Google Patents

Description

  The present invention relates to an image forming apparatus and an opening / closing device.

  In Patent Document 1, it is attached to a main body structure incorporating an image forming device so as to be openable and closable around a rotation axis, and when it is opened beyond the reversal angle, it receives a moment in the opposite direction based on gravity. An upper member that opens the image forming device to the outside, an arm member that is provided with a base end pivotably attached to the upper member, and opening and closing of the upper member on the main body member In the upper structure opening / closing device of the image forming apparatus, the rail member is provided so as to guide the tip of the arm member along with the operation, and the urging member for urging the upper structure in the opening direction is assembled. Provided at a terminal end, when the upper structure is opened to the maximum with respect to the main body structure, is provided with a buffer means for abutting the tip of the arm member to buffer the opening operation of the upper structure. When Superstructure switchgear of the image forming apparatus is disclosed that.

  Patent Document 2 discloses a first housing that constitutes an apparatus main body, and a second housing that is supported by the first housing with one rotation shaft as a fulcrum and that can be opened and closed with respect to the first housing. The first opening / closing assist mechanism and the second opening / closing assist mechanism that share and assist the opening / closing operation of the second casing are directly connected between the first casing and the second casing. An image forming apparatus characterized in that it is interposed is disclosed.

  In Patent Document 3, a document reading unit is configured on an upper part of a document recording unit, the document reading unit and the document recording unit are rotatably attached by a hinge, and the document reading unit is opened. In the document reading and recording apparatus having a stopper that prevents the document reading unit from rotating more than the required angle, the stopper is provided separately from the mechanism member that holds the document reading unit in an open state. A document reading and recording apparatus is disclosed, which is in the vicinity of the center of rotation.

  Patent Document 4 discloses an image forming unit for forming an image on a sheet, a paper discharge tray provided on an upper surface of the image forming unit and ejecting a sheet after image formation by the image forming unit, and the discharge The image reading unit is provided between the image reading unit provided above the paper tray and for reading an image of a document, and a closed position covering the upper side of the paper discharge tray and an open position opening the upper side of the paper discharge tray. A connecting member for connecting the image forming unit and the image reading unit is provided at a position different from the connecting member so as to be rotatable about the first rotation center with respect to the image forming unit. And a rotation restricting member for restricting the rotation of the image reading unit in the opening direction beyond the open position.

JP 2009-134227 A JP 2008-139963 A JP 2006-80864 A JP 2006-119474 A

  An object of the present invention is to provide an image forming apparatus and an opening / closing apparatus that can be easily assembled.

According to a first aspect of the present invention, there is provided an image forming apparatus main body, a supported body rotatably supported by the image forming apparatus main body, and a shock absorber for buffering an impact caused by a rotating operation of the supported body. The shock absorber includes a guide portion provided on the supported body, a guided member provided on the image forming apparatus main body and guided by the guide portion, and a biasing member that biases the guided member. And a shock absorber main body having a support member that movably supports the guided member, and the supported member during assembly before the shock absorber main body is attached to the image forming apparatus main body. the a state that the opening from the image forming apparatus main body, when the guided member is attached to the guide portion, movement preventing portion to prevent the guided member is moved in a direction deviating from the guide portion In the guided member or the guide part Vignetting optionally, wherein the support member, said an image forming apparatus having a suppressing portion bending the guide member prevents the flexing direction deviating from the support member.

The present invention according to claim 2, wherein the biasing member, said an image forming apparatus according to claim 1, wherein suppressing the guided member is bent in a direction deviating from said support member.

The present invention according to claim 3, wherein the guided member, the said supporting the supported portion in the open state from the image forming apparatus main body, wherein the support is an open from the image forming apparatus main body the image forming apparatus according to claim 1 or 2, wherein stops at a position which supports the.

According to a fourth aspect of the present invention, the first structure, the second structure that is rotatably supported by the first structure, and the shock caused by the rotational operation of the second structure are buffered. A shock absorber, and the shock absorber includes a guide portion provided in the second structure, a guided member provided in the first structure and guided by the guide portion, and the cover. A shock absorber main body provided with a biasing member that biases the guide member and a support member that movably supports the guided member, and the shock absorber main body is the first structure. When the second structure is opened from the first structure and the guided member is attached to the guide portion during assembly before mounting, the guided member is disengaged from the guide portion. A movement blocking portion for preventing movement in the direction is provided in the guided member or the guide portion. Have been, the support member, said a switchgear guided member has a bending prevention portion prevents the flexing direction deviating from the support member.

According to the present invention, it is possible to provide an image forming apparatus and an opening / closing apparatus that are easy to assemble and that make it difficult for members to come off as compared with the case where the present structure is not provided.

1 is a perspective view showing an image forming apparatus according to a first embodiment of the present invention. FIG. 2 is a diagram showing a part of the image forming apparatus shown in FIG. FIG. 2 is a cross-sectional view showing the image forming apparatus shown in FIG. 1 from the right side. FIG. 2 is a plan view showing an image forming apparatus main body included in the image forming apparatus shown in FIG. 1. FIG. 4 is a cross-sectional view showing a cross section taken along the plane AA in FIG. FIG. 6 is a cross-sectional view showing the original reading apparatus shown in FIG. 5 and showing a cross section taken along the line BB in FIG. 3. FIG. 6 is a view showing a guide member attached to the document reading apparatus shown in FIG. 5. FIG. 2 is a perspective view showing a shock absorber main body of the shock absorber included in the image forming apparatus shown in FIG. 1 and showing the shock absorber main body when the document reading apparatus is opened from the image forming apparatus main body. FIG. 9 is a perspective view showing the shock absorber when the original reading device is in a closed state with respect to the image forming apparatus, showing the shock absorber main body shown in FIG. 8. It is a right view which shows the shock absorber main-body part shown in FIG. It is sectional drawing which shows the DD surface cross section shown in FIG. 10 of the buffering device main-body part shown in FIG. It is a figure which expands and shows a part of shock absorber main-body part shown in FIG. 8 from the arrow C direction shown in FIG. It is a perspective view which expands and shows a part of shock absorber main-body part shown in FIG. It is a figure explaining the process in which the image forming apparatus shown in FIG. 1 is assembled. It is a figure which shows the state at the time of mounting | wearing with the buffering device main-body part in the original reading apparatus from the right side surface side. It is a figure which shows the state by which the buffering device main-body part was mounted | worn with the original reading apparatus so that it may prevent moving to the direction which remove | deviates from an original reading apparatus from the right side. FIG. 2 is a perspective view illustrating a discharge unit included in the image forming apparatus illustrated in FIG. 1. FIG. 18A shows a state in which the discharge unit shown in FIG. 17 supports the paper. FIG. 18A shows the downstream end of the paper in the same direction in the same direction as the downstream end of the extension in the paper discharge direction. FIG. 18B is a left side view illustrating a state in which the sheet positioned on the upstream side is supported in FIG. 18B, and FIG. 18B illustrates the end of the sheet on the downstream side in the same direction as the downstream end in the sheet discharge direction of the extension. FIG. 6 is a left side view illustrating a state in which a portion supports a sheet positioned on the downstream side in the same direction. FIG. 10 is a perspective view illustrating a modification of the discharge unit included in the image forming apparatus illustrated in FIG. 1. FIG. 6 is a diagram illustrating a lower surface of a document reading device included in an image forming apparatus according to a second embodiment of the present invention. FIG. 21 is a view showing a pair of guide members provided in the document reading apparatus shown in FIG. 20 from the direction of arrow E shown in FIG. 20. One side of a pair of guide member shown in Drawing 21 is shown, Drawing 22 (a) is a sectional view showing the FF section in Drawing 21, and Drawing 22 (b) is a perspective view. It is sectional drawing which shows the other of a pair of guide member shown in FIG. 21, and shows the GG cross section in FIG. FIG. 10 is an enlarged perspective view illustrating a part of a shock absorber main body included in an image forming apparatus according to a second embodiment of the present invention. It is a figure explaining the process in which an arm member is mounted | worn with a guide member in the image forming apparatus which concerns on the 2nd Embodiment of this invention. In the image forming apparatus according to the second embodiment of the present invention, a process when the arm member is attached to the guide member will be described, and FIG. 26 (a) shows the inside of the guide groove formed on one of the pair of guide members. FIG. 26B is a diagram illustrating a state in which the arm member moves in a guide groove formed in one of the pair of guide members.

Next, embodiments for carrying out the present invention will be described with reference to the drawings.
1 to 3 show an image forming apparatus 10 according to a first embodiment of the present invention. As shown in FIGS. 1 to 3, an image forming apparatus 10 includes an image forming apparatus main body 100 used as a first structure, and a document reading apparatus used as a supported body as a second structure. 300 and shock absorbers 500R and 500L.

  An upper surface 108 of the image forming apparatus main body 100 is a sheet used as a recording medium, and is used as a part of a discharge unit 600 that discharges a sheet on which an image is formed. Further, a sheet feeding opening / closing unit 110 is provided on the front surface of the image forming apparatus main body 100. The sheet feeding opening / closing unit 110 is mounted on the image forming apparatus main body 100 using a hinge 112 so as to be opened / closed. FIG. 1 shows a state in which the paper feed opening / closing part 110 is closed with respect to the image forming apparatus main body 100, and FIG. 3 shows the paper feed opening / closing part 110 opened with respect to the image forming apparatus main body 100. The state is shown. Further, the image forming apparatus main body 100 is formed with a discharge hole 102 used for discharging a sheet on which an image is formed.

  An image forming unit 120 and a paper feeding device 160 are mounted in the image forming apparatus main body 100. A conveyance path 180 is formed in the image forming apparatus main body 100. The image forming unit 120 irradiates light onto the surface of the photosensitive drum 122 charged by the charging device 124, the photosensitive drum 122 used as an image holding member, the charging device 124 that charges the surface of the photosensitive drum 122. Thus, a latent image forming device 126 that forms a latent image on the surface of the photosensitive drum 122 and a developing device 128 that develops the latent image formed on the surface of the photosensitive drum 122 by the latent image forming device 126 using a developer. A transfer device 130 that transfers the developer image formed on the surface of the photosensitive drum 122 by the development by the developing device 128 to the paper, and a fixing device that fixes the developer image transferred to the paper by the transfer device 130 on the paper. 140.

  The sheet feeding device 160 includes, for example, one sheet storage unit 162 that stores sheets in a stacked state, and a delivery roll 164 that sends out the sheets stored in the sheet storage unit 162. In order to store a sheet of a certain size or more in the sheet storage unit 162, the sheet feeding opening / closing unit 110 is opened, and when such a sheet is stored, the rear end side of the sheet is the image forming apparatus main body. The part that protrudes from 100 and the sheet protrudes is supported by the paper feed opening / closing part 110 from below in the direction of gravity.

  The conveyance path 180 is a conveyance path that is used for conveying a sheet from the sheet feeding device 160 toward the transfer device 130 and further conveying the sheet to the discharge unit 600. The above-described delivery roll 164, conveyance roll 182, registration roll 184, the above-described transfer device 130, the above-described fixing device 140, and the discharge roller 186 are provided along the conveyance path 180 in order from the upstream side in the sheet conveyance direction. ing.

  The transport roll 182 transports the paper toward the registration roll 184. The registration roll 184 temporarily stops the movement of the leading end portion of the paper conveyed toward the transfer device 130 toward the transfer device 130, and the developer image formed on the photosensitive drum 122 is transferred to the transfer device 130. The movement of the leading edge of the sheet toward the transfer device 130 is resumed so as to coincide with the timing of reaching the position. The discharge roller 186 conveys the sheet on which the developer image is fixed by the fixing device 140 toward the discharge unit 600.

  The document reading apparatus 300 includes a document reading apparatus main body 302 and is supported by the image forming apparatus main body 100 so as to be rotatable using a hinge 310. The document reading apparatus 300 moves between a position opened with respect to the image forming apparatus main body 100 shown in FIGS. 1 and 2 and a position closed with respect to the image forming apparatus main body 100 shown in FIG. It can be opened and closed.

  The shock absorber 500R and the shock absorber 500L are each used as a shock absorber that cushions the impact caused by the rotation operation of the document reading device 300. The shock absorber 500R is on the right side of the image forming apparatus 10, and the shock absorber 500L is the image forming apparatus. It is arranged on the left side of the main body 100. Since the shock absorber 500R and the shock absorber 500L have the same structure, the shock absorber 500R will be described below, and the description of the shock absorber 500L will be omitted. Hereinafter, the shock absorber 500R will be referred to as a shock absorber 500 unless specifically distinguished from the shock absorber 500L.

  The shock absorber 500 includes a guide member 510 used as a guide portion provided in the document reading device 300, and a shock absorber main body 530. The shock absorber main body 530 is provided in the image forming apparatus main body 100 and used as a guided member guided by the guide member 510, and a coil spring 560 used as a biasing member that biases the arm member 534. Have

  FIG. 4 shows the image forming apparatus main body 100. As illustrated in FIG. 4, mounting holes 104 </ b> R and 106 </ b> R for mounting the shock absorber main body 530 </ b> R of the shock absorber 500 </ b> R to the image forming apparatus main body 100 are formed on the upper surface 108 of the image forming apparatus main body 100. . Further, mounting holes 104 </ b> L and 106 </ b> L for mounting the shock absorber main body 530 </ b> L of the shock absorber 500 </ b> L to the image forming apparatus main body 100 are formed on the upward surface of the image forming apparatus main body 100. The mounting holes 104R and 104L are arranged on the front side of the mounting holes 106R and 106L, respectively.

  5 and 6 show the document reading device 300. FIG. The document reading device 300 includes the document reading device main body 302 as described above, and the guide member 510R of the buffer device 500R described above and the guide member of the buffer device 500L described above are provided on the downward surface of the document reading device main body 302. 510L is attached. Further, the document reading apparatus main body 302 includes mounted portions 304 and 304 that are parts to be mounted on the image forming apparatus main body 100 using the above-described hinge 310 (see FIGS. 2 and 3).

  As shown in FIG. 5, the document reading apparatus 300 has a platen member 312 made of a material that transmits light, and the document reading apparatus main body 302 is used as a reading table on which a document is placed. A platen cover 322 that can be opened and closed with respect to the document reading apparatus main body 302 is attached to the document reading apparatus main body 302.

  In the document reading apparatus main body 302, a reading unit 330 is mounted that irradiates light on the document and reads the document based on light reflected from the document. In addition, a document transport device 326 that automatically transports the document D is mounted in the platen cover unit 322. The document reading device 300 has a function of flowing and reading the document D being conveyed by the document conveying device 326 and a function of reading the document D placed on the platen member 312.

  The document conveyance device 326 includes a document table 340 on which a document D before reading is set, a document conveyance path 350 that conveys the document, and a discharge table 360 on which the document after the image is read is discharged.

  The reading unit 330 includes a light source 342, a lens 344, and a photoelectric conversion element 346. The light source 342 irradiates the original with light, collects the reflected light with the lens 344, and collects the collected light to the photoelectric conversion element. 346 receives light and converts it into a signal.

  FIG. 7 shows a guide member 510. As shown in FIG. 7, a guide hole 512 is formed in the guide member 510. A projection 536 (see FIGS. 8 and 9), which will be described later, formed in the arm member 534 (see FIGS. 1 and 2) is inserted into the guide hole 512. The guide member 510 supports the arm member 534 so that the protrusion 536 can rotate in the guide hole 512 and the protrusion 536 can move in the guide hole 512. Thus, since the protrusion 536 moves in the guide hole 512, the movement of the arm member 534 is guided by the guide member 510.

  The shock absorber main body 530 is shown in FIGS. As described above, the shock absorber main body 530 includes the arm member 534 and the coil spring 560, and further includes the support member 564 that supports the arm member 534 so as to be movable.

  The arm member 534 includes two side plate portions 544 facing each other, a side plate portion 546, and a connecting portion 548 that is substantially perpendicular to the side plate portion 544 and the side plate portion 546 and connects the side plate portion 544 and the side plate portion 546. ing. Further, the arm member 534 has a protrusion 536 inserted into the guide hole 512 of the guide member 510. The protrusion 536 is formed on the one end portion side of the arm member 534 so as to protrude from the right side to the left side. Further, the arm member 534 has a spring mounting portion 538 to which one end side of the coil spring 560 is mounted.

  Moreover, the arm member 534 has linear portions 540 and 540 having a linear shape on the other end side. The straight line portions 540 are formed on the side plate portion 544 and the side plate portion 546, respectively. In the state shown in FIGS. 8 and 10 that supports the document reading apparatus 300 that is opened from the image forming apparatus main body 100, the straight portions 540 and 540 are formed by the coil spring 560 on the upward plane of the support member 564. The arm member 534 is stopped by being pressed and the straight portions 540 and 540 being pressed. As described above, the arm member 534 supports the document reading device 300 opened from the image forming apparatus main body 100 and stops at a position supporting the document reading device 300 opened from the image forming apparatus main body 100. It is like that.

  The support member 564 has a spring mounting portion 566 to which the other end portion of the coil spring 560 is mounted. The support member 564 includes an insertion protrusion 568 inserted into the mounting hole 104 (see FIG. 4) when the shock absorber main body 530 is attached to the image forming apparatus main body 100, and the shock absorber main body in the image forming apparatus main body 100. An insertion protrusion 570 that is inserted into the mounting hole 106 (see FIG. 4) when the 530 is attached is formed.

  Further, the support member 564 has a screw retaining portion 572 that is a portion screwed to the image forming apparatus main body 100 when the shock absorber main body 530 is attached to the image forming apparatus main body 100. In addition, the support member 564 includes a suppression protrusion 574 that is used as a bending suppression portion that suppresses the arm member 534 from bending in a direction away from the support member 564. Further, the protrusion 536 is provided with a protrusion 556. Details of the protrusion 556 will be described later.

  FIG. 11 shows a cross section of the D-D plane shown in FIG. 10 of the shock absorber main body 530. As shown in FIG. 11, a support recess 580 and a support recess 582 are formed in the support member 564. Further, a supporting convex portion 550 is formed on the side plate portion 544, and a supporting convex portion 552 is formed on the side plate portion 546. Then, by inserting the support convex portion 550 into the support concave portion 580 and inserting the support convex portion 552 into the support concave portion 582, the arm member 534 is supported so as to be able to rotate to the support member 564. .

  When the arm member 534 is attached to the support member 564, as shown by an arrow in FIG. 11, the arm member 534 is deformed so as to be bent so that the side plate portion 544 and the side plate portion 546 come close to each other. The support convex portion 550 is inserted into 580, and the support convex portion 552 is inserted into the support concave portion 582. At this time, the arm member 534 is positioned relative to the support member 564 in a state where the arm member 534 is disposed at the position shown in FIG. Installed.

  After the arm member 534 is attached to the support member 564 and the coil spring 560 is attached, the coil spring 560 is disposed between the side plate portion 544 and the side plate portion 546 in the state shown in FIG. Therefore, the arm member 534 is difficult to bend in the direction in which the arm member 534 is detached from the support member 564. As described above, the coil spring 560 suppresses the arm member 534 from being bent in a direction away from the support member 564.

  Further, in the state shown in FIG. 8, since the suppression protrusion 574 is disposed between the side plate portion 544 and the side plate portion 546, the arm member 534 is moved away from the support member 564. Becomes difficult to bend. In this manner, the suppression protrusion 574 suppresses the arm member 534 from bending in a direction away from the support member 564.

  12, the vicinity of the position where the projection 536 of the arm member 534 is formed is shown enlarged from the direction of arrow C shown in FIG. 8, and the projection 536 is shown enlarged. As shown in FIGS. 12 and 13, the protrusion 536 is formed on the side plate portion 546 and has a substantially cylindrical shape. Further, on the opposite side of the projection 536 from the side plate portion 546, a projection portion 556 that is used as a movement blocking portion and projects in a direction substantially parallel to the side plate portion 546 from the projection 536 is provided.

  FIG. 14 illustrates a process in which the image forming apparatus 10 is assembled. FIG. 15 shows a state at the time when the shock absorber main body 530 is mounted on the document reading device 300, and FIG. 16 prevents movement in a direction away from the document reading device 300. The state where the shock absorber main body 530 is mounted on the document reading device 300 is shown.

  As shown in FIG. 14, in step S <b> 10, document reading apparatus 300 is mounted on image forming apparatus main body 100. At this time, the mounted portions 304 and 304 of the document reading apparatus main body 302 are mounted on the image forming apparatus main body 100 by the hinge 310.

  In step S20, which is the next step, document reading apparatus 300 is opened with respect to image forming apparatus main body 100.

  In the next step S <b> 30, the shock absorber body 530 is attached to the guide member 510 attached to the document reader body 302 by attaching the arm member 534 to the guide member 510. More specifically, as shown in FIG. 15, a projection 536 formed on the arm member 534 is inserted into the guide hole 512 formed in the guide member 510 from the right side (the front side in FIG. 15) to the left side (the rear side in FIG. 15). Side). At this time, the angle of the shock absorber main body 530 with respect to the document reading device 300 is adjusted so that the protrusion 556 is disposed at a position where it does not buffer with the guide member 510 as shown in FIG. Is inserted into the guide hole 512. When the protruding portion 556 and the protrusion 536 are inserted into the guide hole 512, the protrusion 536 comes into contact with the guide member 510, and the protruding portion 556 is positioned further to the left (back side in FIG. 15) than the guide member 510. .

  In the next step S40, the shock absorber main body 530 is moved to a position where the arm member 534 is prevented from moving in a direction away from the guide member 510. More specifically, the shock absorber main body 530 is pushed from the state shown in FIG. 15 to the rear side (right side in FIG. 15), and the protrusion 536 is guided by the guide hole 512 to move. Move backward. Then, as shown in FIG. 16, the protrusion 536 is disposed at the rear end portion of the guide hole 512. Further, when the assembler releases the hand from the shock absorber main body 530 in this state, the shock absorber main body 530 rotates in the direction opposite to the clockwise direction around the protrusion 536 from the angle shown in FIG. 15 to the angle shown in FIG. .

  In the state shown in FIG. 16, the protruding portion 556 is located on the left side of the guide member 510 and is disposed at a position where it can cushion the guide member 510 when the arm member 534 is moved to the right side. For this reason, the arm member 534 is prevented from moving in a direction away from the guide member 510.

  In step S50, which is the next step, the arm member 534 is prevented from moving in a direction away from the guide member 510, and the shock absorber main body 530 is mounted in the original reading device 300 while the shock absorber main body 530 is mounted on the document reading device 300. Mounted on the image forming apparatus main body 100. At this time, the insertion protrusion 570 is inserted into the mounting hole 106, the insertion protrusion 568 is inserted into the mounting hole 104, and the screw retaining portion 572 is screwed to the image forming apparatus main body 100.

  As described above, the projecting portion 556 is in a state in which the document reading device 300 is opened from the image forming apparatus main body 100 during assembly before attaching the buffer device main body 530 to the image forming apparatus main body 100, and the arm member 534 is moved. When mounted on the guide member 510, the arm member 534 is used as a movement blocking portion that prevents the arm member 534 from moving in a direction away from the guide member 510.

  FIG. 17 shows the discharge unit 600. The discharge unit 600 is provided on the upper surface 108 of the image forming apparatus main body 100 used as the discharge unit main body and on the surface 108 so as to be extendable from the surface 108 in the paper discharge direction indicated by an arrow E in FIG. Extension portion 610. The extension 610 includes a first extension member 614 that can be extended from the surface 108 in the paper discharge direction, and a second extension member 620 that can be extended from the first extension member in the paper discharge direction. Have. The extension portion 610 supports a portion protruding from the sheet surface 108 on which an image is formed from the lower side in the gravity direction.

  The extension portion 610 has a hook portion 630 that is recessed on the opposite side of the back surface (lower surface) of the paper so that the finger is hooked in the direction in which the extension portion 610 extends in the paper discharge direction. doing. The extension 610 has two projecting portions 640 and 640 that project to the back side of the sheet. As shown in FIG. 17, the hook 630 is disposed at a position between the two protrusions 640 and 640.

  The hook portion 630 is provided on the downstream side in the paper discharge direction with respect to the first concave portion 632 that is recessed on the opposite side of the back surface of the paper, and the second concave portion is deeper than the first concave portion 632. And a wall surface 636 that is provided downstream of the second recess 634 in the paper discharge direction and intersects the paper discharge direction.

  In FIG. 18A, the discharge unit 600 supports the paper whose downstream end in the same direction is located upstream of the downstream end 622 of the extension 610 in the paper discharge direction. In FIG. 18B, the end portion in the same direction is positioned on the downstream side in the same direction as the end portion 622 of the extension portion 610 in the paper discharge direction. The state of supporting the paper is shown. As described above, the extension 610 may support a sheet in which the end on the downstream side in the same direction is located upstream of the end 622 on the downstream side in the sheet discharge direction of the extension 610. In some cases, the end portion 622 supports a sheet whose end portion is located on the downstream side in the same direction.

  As illustrated in FIG. 18B, the discharge unit 600 supports a sheet whose end in the same direction is located downstream in the same direction as the downstream end 622 of the extension 610 in the sheet discharge direction. In this case, the sheet falls so that the portion between the portion supported by the one protrusion 640 from below and the portion supported by the other protrusion 640 from below falls into the hook portion 630, and the sheet is curved. The paper is stiff due to the curvature.

  The extension portion 610 may be extended when in use, and may be in a contracted state when not in use.

  FIG. 19 shows a modified example of the discharge unit 600. In the discharge section 600 included in the image forming apparatus 10 according to the above-described embodiment of the present invention, the hook section 630 is formed by a combination of planes. In this modification, the hook section 630 is configured by a curved surface. Has been. Since the portions other than those described above are the same as the discharge unit 600 included in the image forming apparatus 10 according to the above-described embodiment of the present invention, description thereof will be omitted.

  In the embodiment described above, the document reading apparatus is used as a supported body that is rotatably supported by the image forming apparatus body and as a second structure that is rotatably supported by the first structure. However, the present invention can also be applied to a configuration in which a device other than the document reading apparatus is used as the supported member and the second structure is used. For example, the present invention can be applied to a form in which a post-processing apparatus that performs post-processing on a sheet on which an image is formed is used as a supported body and as a second structure.

  FIG. 20 shows a lower surface of the document reading apparatus 300 included in the image forming apparatus 10 according to the second embodiment of the present invention. In the image forming apparatus 10 according to the first embodiment described above, the guide member 510 is used as a guide portion, the arm member 534 is used as a guided portion, and the protruding portion 556 used as a movement blocking portion is an arm member 534. Was provided. On the other hand, in the image forming apparatus 10 according to the second embodiment, the movement preventing portion is provided on the guide member side. That is, when assembling before attaching the shock absorber main body 530 to the image forming apparatus main body 100, when the document reading device 300 is opened from the image forming apparatus main body 100 and the arm member 534 is attached to the guide member, The guide member is provided with a movement blocking portion that prevents the member 534 from moving in a direction away from the guide member.

  In the image forming apparatus 10 according to the first embodiment described above, the guide member 510R of the buffer device 500R and the guide member 510L of the buffer device 500L are mounted on the downward surface of the document reading apparatus main body 302. (See FIG. 6). In contrast, in the image forming apparatus 10 according to the second embodiment, as shown in FIG. 20, the first guide member 514R and the second guide member 514R of the shock absorber 500R are formed on the downward surface of the document reading apparatus main body 302. The guide member 520R, the first guide member 514L and the second guide member 520R of the shock absorber 500L are mounted. That is, in the image forming apparatus 10 according to the first embodiment described above, each of the shock absorber 500R and the shock absorber 500L has one guide member, but this second embodiment. In the image forming apparatus 10, each of the shock absorber 500R and the shock absorber 500L has a pair of guide members.

  In the second embodiment as well, since the shock absorber 500R and the shock absorber 500L have the same structure as in the first embodiment, the shock absorber 500R will be described below, and the shock absorber 500L will be described. Is omitted. Hereinafter, the shock absorber 500R will be referred to as a shock absorber 500 unless specifically distinguished from the shock absorber 500L.

  The first guide member 514 and the second guide member 520 are both plate-shaped, and are substantially parallel to the paper conveyance direction, the distance between them is substantially constant, and the document reading apparatus main body is substantially parallel to each other. 302 is attached to the downward surface.

  FIG. 21 shows the first guide member 514 and the second guide member 520. A guide groove 515 is formed on the surface of the first guide member 514 facing the second guide member 520. A guide groove 521 is formed on the surface of the second guide member 520 that faces the first guide member 514. Here, the length between the end of the guide groove 515 opposite to the guide groove 521 and the end of the guide groove 521 opposite to the guide groove 515 is L8.

  FIG. 22 shows the first guide member 514. The guide groove 515 formed in the first guide member 514 has an end on the front side (left side in FIG. 22A) reaching the end on the front side of the first guide member 514, and the rear side (FIG. 22B). The right end) of the first guide member 514 remains in front of the rear end. Further, the guide groove 515 is located on the front side and has a relatively narrow width portion 516, and on the rear side of the narrow portion 516, the wide width portion is wider than the narrow portion 516. 517. Here, the width in the guide groove 515 refers to the length from one end side to the other end side in the direction orthogonal to the longitudinal direction of the guide groove 515. Hereinafter, the width of the narrow portion 516 is L1, and the width of the wide portion 517 is L2.

  FIG. 23 shows the second guide member 520. The guide groove 521 formed in the second guide member 520 has an end on the front side (right side in FIG. 23) reaching the front end on the second guide member 520 and an end on the rear side (left side in FIG. 23). Remains on the front side of the rear end portion of the second guide member 520. In addition, the guide groove 521 is located on the front side and has a relatively narrow width portion 522, and on the rear side of the narrow portion 522, the wide portion that is wider than the narrow portion 522. 523. Here, the width of the guide groove 521 refers to the length from one end side to the end side in a direction orthogonal to the longitudinal direction of the guide groove 521. The width of the narrow portion 516 of the guide groove 521 is L1 like the guide groove 515. Further, the width of the wide portion 523 of the guide groove 521 is L2 like the guide groove 515.

  In FIG. 24, a part of the arm member 534 of the shock absorber main body 530 included in the image forming apparatus 10 according to the second embodiment is shown enlarged. In the image forming apparatus 10 according to the first embodiment described above, the protrusion 536 is formed on one end portion side of the arm member 534 so as to protrude from the right side to the left side (see FIG. 8). On the other hand, in the second embodiment, the first protrusion 590 is formed on the one end portion side of the arm member 534 so as to protrude from the right side to the left side, and from the left side to the right side on the one end portion side of the arm member 534. A second protrusion 592 is formed so as to protrude.

  Both the first protrusion 590 and the second protrusion 592 have a shape in which a part of a cylinder is cut off in the longitudinal direction, and the cross section has a so-called D-shape. The diameter of the long diameter portion, which is the diameter of the portion of the first protrusion 590 and the second protrusion 592 that is not cut off in the cross section in the cross section, is L3. Further, the diameter (part of the diameter) of the short diameter portion, which is the diameter of a portion of the first protrusion 590 and the second protrusion 592, in which a part of the circumference is cut off in the cross section, is L4. The diameter L3 is the width of the wide portion 517 of the guide groove 515 and is slightly smaller than the width L2 which is the width of the wide portion 523 of the guide groove 521. The diameter L4 is the width of the narrow portion 516 of the guide groove 515, and is slightly smaller than the width L1 that is the width of the narrow portion 522 of the guide groove 521.

  The length between the left end of the first protrusion 590 and the right end of the second protrusion 592 is L9. The length L9 is a length L8 between the end of the guide groove 515 opposite to the guide groove 521 and the end of the guide groove 521 opposite to the guide groove 515 (see FIG. 21). Slightly shorter than.

  In FIG. 25, in the process of assembling the image forming apparatus 10 according to the second embodiment, the shock absorber body 530 is attached to the first guide member 514 and the second guide member 520 by attaching the arm member 534 to the first guide member 514. A process of mounting on the guide member 514 and the second guide member 520 is described (see S30 in FIG. 14). In this step, as shown in FIG. 25, the first protrusion 590 is inserted into the guide groove 515 and the second protrusion 592 is inserted into the guide groove 521.

  26 shows how the first protrusion 590 moves in the guide groove 515 and the second protrusion in the guide groove 521 when the arm member 534 is mounted on the first guide member 514 and the second guide member 520. A state in which 592 moves is shown. When mounting the arm member 534, the angle of the shock absorber main body 530 with respect to the document reading device 300 is adjusted, and the first protrusion 590 passes through the narrow portion 516 of the guide groove 515 as shown in FIG. The first protrusion 592 can pass through the narrow portion 522 of the guide groove 521.

  More specifically, the directions of the narrow portion 516 of the guide groove 515 and the short diameter portion (the portion having a diameter L4) of the first protrusion 590 match, and the narrow portion 522 of the guide groove 521 and the second protrusion 590 are aligned. The shock absorber main body 530 is pushed from the front side toward the rear side so that the direction of the short diameter portion (the portion having the diameter L4) matches. At this time, if the orientation of the narrow portion 516 and the short diameter portion of the first protrusion 590 do not match, or if the orientation of the narrow portion 522 and the short diameter portion of the second protrusion 590 does not match, the arm member 534. Cannot be mounted on the first guide member 514 and the second guide member 520. The diameter L3 of the long diameter part of the first protrusion 590 is longer than the width L1 which is the width of the narrow part 516 of the guide groove 515, and the diameter L3 of the long diameter part of the second protrusion 592 is the width of the narrow part 522 of the guide groove 521. This is because it is longer than the width L1.

  After mounting the arm member 534 on the first guide member 514 and the second guide member 520, the shock absorber main body 530 has the first protrusion 590 passing through the narrow part 516 and the second protrusion 592 passing through the narrow part 522. It is pushed backward to the passing position and moves backward. Then, after moving toward the rear, the shock absorber main body 530 is moved to a position where the arm member 534 is prevented from moving in a direction away from the first guide member 514 and the second guide member 520. More specifically, the shock absorber main body 530 is further moved to the rear side. For example, when the operator releases the hand from the shock absorber main body 530, as shown in FIG. The projection 590 and the second projection 592 are rotated.

  In a state after the shock absorber main body 530 is rotated, the diameter L3 of the long diameter portion of the first protrusion 590 is larger than the width L1 of the narrow width portion 516 of the guide groove 515, and the diameter of the long diameter portion of the second protrusion 592. Since L3 is larger than the width L1 of the narrow portion 522 of the guide groove 521, when the shock absorber main body 530 is pulled out to the front side, the first projection 590 cushions to the first guide member 514, and the second projection 592 2 Buffer on the guide member 520. For this reason, the arm member 534 is prevented from moving in the forward direction, which is a direction away from the guide member 510.

  The length L9 (see FIG. 24) between the left end of the first protrusion 590 and the right end of the second protrusion 592 in the arm member 534 is opposite to the guide groove 521 of the guide groove 515. Is slightly shorter than the length L8 (see FIG. 21), which is the length between the end of the guide groove 521 and the end of the guide groove 521 opposite to the guide groove 515, and both are substantially the same length. It is. For this reason, the arm member 534 moves to the left and right, and the first protrusion 590 is unlikely to be detached from the guide groove 515 and the second protrusion 592 is not likely to be detached from the guide groove 521.

  As described above, the present invention can be applied to an image forming apparatus such as a copying machine, a facsimile machine, and a printer, and an opening / closing device.

DESCRIPTION OF SYMBOLS 10 ... Image forming apparatus 100 ... Image forming apparatus main body 108 ... Surface 300 ... Document reading apparatus 302 ... Document reading apparatus main body 500 ... Buffering device 510 ... Guide member 512 ... Guide hole 514: first guide member 515: guide groove 520: second guide member 521: guide groove 530: shock absorber main body 534: arm member 536: protrusion 540 ... Linear portion 556 ... Projection portion 560 ... Coil spring 564 ... Support member 574 ... Suppression projection 590 ... First projection 592 ... Second projection

Claims (4)

An image forming apparatus main body;
A supported body rotatably supported by the image forming apparatus main body;
A shock absorber for buffering an impact caused by the rotational motion of the support;
Have
The shock absorber is
A guide provided on the support;
A shock absorber having a guided member provided in the image forming apparatus main body and guided by the guide portion, a biasing member that biases the guided member, and a support member that movably supports the guided member. The main body,
Have
During pre-assembly mounting said buffer device main body to the image forming apparatus main body, there the object support in a state of opening from the image forming apparatus main body, when the guided member is attached to the guide section, wherein provided in the mobile blocking part said guided member or the guiding unit to prevent the guided member is moved in a direction deviating from said guide portion,
The image forming apparatus according to claim 1, wherein the support member includes a bending suppression unit that suppresses the guided member from bending in a direction away from the support member . The biasing member, the image forming apparatus according to claim 1, wherein inhibiting said guided member is bent in a direction deviating from said support member. The guided member is claims wherein said supporting the supported portion in the open state from the image forming apparatus main body, said stationary in a position for supporting the supported member which is in the open state from the image forming apparatus main body The image forming apparatus according to 1 or 2 . A first structure;
A second structure rotatably supported by the first structure;
A shock absorber that cushions an impact caused by the rotational motion of the second structure;
Have
The shock absorber is
A guide provided in the second structure;
A guided member provided in the first structure and guided by the guide portion, a biasing member that biases the guided member, and a support member that movably supports the guided member . A shock absorber main body,
Have
At the time of assembly before attaching the shock absorber main body to the first structure, the second structure is opened from the first structure, and the guided member is attached to the guide In this case, a movement blocking part for preventing the guided member from moving in a direction away from the guiding part is provided in the guided member or the guiding part ,
The opening and closing device , wherein the support member includes a bending suppression unit that suppresses the guided member from bending in a direction away from the support member .

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